Guardian angel



FIG. 1 is a frontal elevation of a guardian angel showing my new design;

FIG. 2 is a top view;

FIG. 3 is a left side elevation;

FIG. 4 is a rear elevation;

FIG. 5 is a right side elevation thereof; and,

FIG. 6 is a bottom view. 

The ornamental design for a guardian angel, as shown and described herein. 